/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffectExecutionCalculation.h
Attempts to calculate the magnitude of a transient aggregator given the specified parameters, including a starting base value.
True if the magnitude was successfully calculated, false if it was not
bool AttemptCalculateTransientAggregatorMagnitudeWithBase ( const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & InAggregatorIdentifier, const [FAggregatorEvaluateParameters](API\Plugins\GameplayAbilities\FAggregatorEvaluateParameters) & InEvalParams, float InBaseValue, float & OutMagnitude ) const